import { type Annotation, type XfdfImportResult } from "@vue-pdf-viewer/shared";
export declare class XfdfSerializer {
    private static serializeAnnotation;
    private static serializeTextMarkup;
    private static serializeFreeText;
    private static bitmapToDataUrlSync;
    private static serializeStamp;
    private static serializeInk;
    private static serializePopup;
    private static serializeShape;
    private static serializeLine;
    private static serializeVertexAnnotation;
    static exportToXfdf(annotations: Annotation[], pdfFilename?: string): string;
    private static parseAnnotationElement;
    private static parseTextMarkup;
    private static parseFreeText;
    private static parseStamp;
    private static parseInk;
    private static parsePopup;
    private static parseShape;
    private static parseLine;
    private static parseVertexAnnotation;
    static importFromXfdf(xfdfString: string, pageCount: number): XfdfImportResult;
}